Finding the Fourth Proportional to 136,129.87, 187,831.69 and 79,530.31
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Solution
The fourth proportional to 136,129.87, 187,831.69 and 79,530.31 is: 109,735.75
Step by Step Solution
- Step 1: Write the proportion equation
136,129.87 : 187,831.69 = 79,530.31 : x - Step 2: Convert to fraction form
136,129.87/187,831.69 = 79,530.31/x - Step 3: Cross multiply
136,129.87x = 187,831.69 × 79,530.31 - Step 4: Simplify right side
136,129.87x = 14,938,313,016.85 - Step 5: Solve for x
x = 14,938,313,016.85/136,129.87 - Step 6: Final answer
x = 109,735.75
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.